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JPS55136794

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DESCRIPTION JPS55136794
1. Loudspeaker diaphragm opening for a speaker) Loudspeaker diaphragm in which a
corrugation connector is formed, recessed portion space of corrugation 1: elastic member is
applied to control resonance 1: for speaker Diaphragm.
2, the scope of claims
8. Detailed Description of the Invention The present invention relates to a speaker diaphragm,
and more particularly to a speaker diaphragm 1 having a corrugation formed thereon. It is ideal
that the entire surface of the diaphragm for loudspeakers performs the same piston movement,
but in actuality, the state where it vibrates by the driving force of the driver differs depending on
the position 1 of the diaphragm. For example, the diaphragm often causes divided vibration, and
the sound emitted from each of the n locations n interferes with each other by moving separately
in each part of the diaphragm. The relative phase makes the response high and low. This state
changes by one frequency 1 :: and <1 :, it is often possible that the treble area characteristic is
high. In order to prevent such a phenomenon (2, as schematically shown in FIG. 1, an elastic
material is applied to the diaphragm / plate to control the resonance to prevent peaks and dips in
the acoustic characteristics or not. However, since the elastic material 2 is applied to the entire
surface of the diaphragm / one side, there is a problem that the overall weight increases and the
response decreases. In addition, although it is a practice to form corrugations for the purpose of
preventing the divided vibration of the diaphragm, there is a problem that it is more difficult to
control resonance than one in which the entire one side of the diaphragm is covered with an
elastic material. . Therefore, the present invention is intended to obtain a diaphragm that is easy
to perform resonance control while taking advantage of the advantage of preventing deflection,
which is an advantage of corrugation, in a diaphragm with corrugation. Therefore, as a means for
controlling resonance An elastic material is applied to the recess space of the corrugation, and
11-05-2019
1
the amount thereof is determined in relation to the folding of the diaphragm. An embodiment of
the present invention will be described below with reference to FIG. First of all, in Fig. 5,
reference numeral 10 indicates a diaphragm, and a plurality of corrugations l / are applied along
the circumferential direction of the diaphragm 10 to reinforce the diaphragm surface and
perform two-resonance control. There is. However, the location, size and number of the
corrugation t / are determined in relation to the resonance n 21 ° corrugation of this moving
plate // 1: thus the corrugation formed by four parts // a elastic material A gel-like substance, an
emulsion substance and a rubber-like substance are applied as / J, and the concave space of 7 is
filled. This corrugation recess / / a, depending on the shape of the corrugation, there is a convex
case [Fig. 2) downward convex case C Figure 3) depending on the shape of the corrugation
Because f, b, so that the recess (two elastic material is applied. And the frequency characteristics
of the obtained diaphragm and the diaphragm with no elastic material applied to the corrugation
concave portions are as shown in FIG.
It can be understood that the dip is averaged. In one or more of the above description, the shape
of the corrugation is along the circumferential direction 1: but may be along the radial direction.
As apparent from the above description, according to the speaker diaphragm of the present
invention, since the elastic material is applied to the corrugation recess formed in the diaphragm,
deformation of the diaphragm and the like can be prevented and resonance control can be
appropriately performed. (I can do two things and get good ones with good acoustic
characteristics.
4. Brief description of the drawings. FIG. 1 is a schematic sectional view of a conventionally
known diaphragm n. FIG. 2 is a schematic sectional view showing an embodiment of a diaphragm
according to the present invention. 4 is a characteristic comparison diagram. lO: Diaphragm, //:
Corrugation, //: Corrugation recess, 2: Elastic material. Takeyou Deji Pioneer Pioneer Co., Ltd.
Attorney Attorney Kobayashi Nobu Fuyu Attorney Murai Susumu EndPage: 2
11-05-2019
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